The property that an ideal whose annihilator is zero contains a regular element is examined from the point of view of constructive mathematics. It is shown that this property holds for nitely presented algebras over discrete elds, and for coherent, Noetherian, strongly discrete rings that contain an in nite eld. Let R be a commutative ring and M an R-module. For any subset I of R, we write AM(I...

We study Rabi oscillations in a two-level system within the semiclassical approximation as an archetype test field of Averaging Method (AM). The population transfer between two levels is approached first and second order AM. systematically compare AM predictions with rotating wave (RWA) complete numerical solution utilizing standard algorithms (NRWA). both resonance (Δ = 0) out-of-resonance () ...

For a given nonnegative n × n matrix A consider the following quantity s(A) := mini,j(A)ij maxi,j(A)ij , m = 1, 2, . . . as long as the denominator is positive. It is simply the ratio between the smallest and the largest entries of Am. We call s(Am) the inverse spread of Am which is interpreted as a measure of the maximum variation among the entries of Am in the multiplicative and reciprocal se...

Scaffolds derived from decellularized tissues provide a natural microenvironment for cell culture. Embryonic cerebrospinal fluid (e-CSF) contains factors which play vital roles in development of the nervous system. This research was aimed to survey the effect of Wistar rat e-CSF on neural differentiation of bone marrow derived mesenchymal stem cells (BM-MSCs) cultured on the human amniotic memb...

Physical characteristics of different features in desert is a reflection of severe thermal and climatic conditions. In this paper, diurnal surface temperature patterns of important surface features in Lut Desert were studied and the relationship among different surfaces analyzed. Diurnal trend in surface temperature of surface types, marl, dark sand, light sand, salt-affected soil, soul at 10 c...

Forty-eight new mutations at the am locus of Neurospora crassa have been characterized. Nineteen mutations were induced by UV; of these, eight were missense, two were frameshifts, two were nonsense, three were deletions and four were unidentified. Twenty-nine mutations were induced with nitrous acid; of these, twenty-one were missense, three were frameshifts, one was nonsense, two were deletion...

Dear Weekes I suppose you begin to think I have almost forgot there is such a place as Hurst, at least that it is now inhabited by any person I know; however, I assure you that is not the case. I am sorry to hear of the Death of poor Tom Wadg's Wife; it must be a great loss to him; the Puerperal Fever is certainly a terrible disease, and since I have attended Dr. Clarke's78 Lectures on Midwifer...

thin films of binary bi 0 -teo and bi 0 -v 0 systems were prepared by the thermal co-evaporation technique in a vacuum at room temperature. the optical absorption edge of these systems are studied in the wavelength of 200-800 nm using a perkin-elmer uv/vis spectrophotometer. it is found that the value of n=3/2 in the davis-mott equation is best fitted for the fundamental absorption edge for the...

in order to evaluate arbuscular mycorrhiza (glomuss mossea) and mycorrhiza-like (piriformospora indica) effects on yield, yield components and some morphological (cv. azar 2) traits of wheat (triticum aestivum l.) under water deficit stress, a pot experiment was conducted as factorial experiment based on completely randomized design with four replications. treatments were drought stress at thre...